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Cast copper drop ear 90 degree elbow with sweat and FNPT connections

Nibco, Inc.

Nibco, Inc. 70735LF-1 1 in Drop Ear 90 Deg Elbow Cast Copper

SKU CH-Y1W3-TZ3N2 MPN 70735LF-1

A cast-copper drop-ear 90-degree elbow joins 1-inch copper tube to 1-inch FNPT for potable water at up to 395 psi and 200 °F

  • TypeDrain Components
  • MaterialHAWA
  • Drop-ear design secures pipe to framing
  • Cast copper construction meets potable-water standards
  • 395 psi rating handles high-pressure supply lines
  • 200 °F max temperature suits hot-water systems
  • Low-lead alloy certified to NSF/ANSI 372 and 61

Drop-Ear 90° Copper Elbow

The Nibco 70735LF-1 is a cast copper drop-ear elbow designed for potable water systems. It provides a 90 degree turn with a sweat connection on one side and a 1 inch FNPT threaded connection on the other. The fitting meets ASME B16.18, NSF/ANSI 61 and NSF/ANSI 372 standards for safe drinking water use. It is rated for a maximum operating pressure of 395 psi at temperatures up to 200 degrees F.

Sweat-and-Thread Transition Fitting

This elbow joins 1 inch copper tube to a 1 inch female pipe thread, allowing a secure transition from soldered piping to threaded components. The drop-ear design includes mounting ears for fastening to structural members, which stabilises the joint and reduces stress on the solder connection. Cast copper construction in material grade C87850 ensures compatibility with standard plumbing tools and solder alloys.

For Copper Potable Water Installations

Plumbers and contractors installing or repairing potable water lines where a threaded outlet must be anchored will find this fitting matches the required specifications. It is not intended for gas, compressed air or hydronic heating systems where different pressure or temperature ratings apply. Installers needing a straight coupling, a reducing elbow or a press-fit connection should select a different fitting type.

Highlights

  • Drop-ear design secures pipe to framing
  • Cast copper construction meets potable-water standards
  • 395 psi rating handles high-pressure supply lines
  • 200 °F max temperature suits hot-water systems
  • Low-lead alloy certified to NSF/ANSI 372 and 61

Specifications

TypeDrain Components
MaterialHAWA
BrandNibco
Model70735LF-1

Questions about this item

How much pressure can this 1 in drop ear elbow handle before it becomes a concern?

The fitting is rated for a maximum operating pressure of 395 psi, so sustained use beyond that level is the first limit you will reach.

Does the cast copper body run hot or make noise when water flows continuously at 200 Degrees F?

At the rated 200 Degrees F maximum operating temperature the copper remains stable and silent; no additional heat or noise issues appear during all-day operation.

What pipe and tools must I already have to install this sweat fitting?

You need 1 in copper tube with a 1 1/8 in outer diameter for the sweat side and 1 in NPT male threads for the other side, plus flux, solder and a torch to make the joint.

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